Geochemistry Of Trace Elements In Primary Coal From Peigou Mine,Xinmi Coalfield

Although the content of trace elements in coal is few,coal mining and the usage are very big.In recent years,the environmental problems often happen caused by burning coal.Some precious matals,rare earth elements ecrichment in coal can reach mineralization grade,and have potential exploitation value.Study of trace elements in coal,provides the theory that the trace elements impact on the environment for reduce and control environmental problems.Study of trace elements is of great significance.In Henan Province,although the poisoning and environment pollution are rarely reported caused by burning coal.But some harmful element content is over relevant national environmental standards in some mining area coal gangue and the soil.So the research on trace elements in coal of henan province is necessary.Research on trace elements in coal of henan province is less,especially after strong tectonic movement formed less structure of coal.Tectonically deformed coal is widely development in the No.2-1 Coal bed of Peigou Mine as the research object,a total of 18 bench samples were taken from No.2-1 coals seam in Peigou Mine,including 15 coal bench samples(No.1-No.15),two roofs(No.16 and No.17)and one floor(No.0).Study on kinds of element contents such as mercury,rare earth elements,heavy metal elements in the No.21 Coal bed of Peigou Mine.Through comparing the trace elements content of Peigou mining with main coal in home and abroad,and calculating the trace element enrichment,to determine whether trace elements are enrichment.Analysis the content characteristics of trace elements in the vertical stratification of variation.Analysis the correlation between the mercury,rare earth elements and 10 kinds of heavy metal elements and the ash,determining the organic affinity.By comparing the correlation between trace elements and main elements,based on mineralogy,geochemistry,determine the occurrence state of trace element.And determine by using scanning electron microscopy(SEM)micro zone spectroscopy.Research conclusion:(1)Heavy metal elements,V,Cr,Mn,Co,Ni,Cu,Zn,Sr,Ba in the No.2-1 Coal bed of Peigou Mine relative is loss,Hg,As,Mo,Pb,Sc,Th and ?REE is normal,Se isvery rich.(2)Constent of heavy metal elements and metalloid elements in coals from Peigou mine,not uniformity,it's difference is very big in the part adjacent layers,there are no large-scale migration in vertical when development of Tectonically deformed coal and not apparent homogenization.(3)Arsenic of the No.2-1 Coal bed of Peigou Mine is organic state occurrence.Vanadium and chromium mainly occurs in the Clay mineral such as Kaolinte and illite,contact with sulfate and sulfide minerals,speculated that Chromium exists in the form of chromium sulfate.Selenium mainly occurs in the mineral Kaolinite,closely associated with Rutile.Lead mainly occurs in the clay mineral Kaolinite,may occur in Pyrite.Barium is more correlated with the clay minerals,and sulfate mineral correlation.Scandium are no significant correlation with the main minerals in coal.Thorium mainly occurs in the clay mineral kaolinite,may occur in pyrite and rutile.Copper mainly in the form of sulfate mineral or sulfur.Molybdenum mainly occurs in the rutile.Mercury of the No.2-1 Coal bed of Peigou Mine mainly occurs in Clay mineral and Calcite.Rare Earth Elements of the No.2-1 Coal bed of Peigou Mine closely associated with clay minerals,kaolinite.